The article linked doesn't go into a lot of detail, but, it doesn't sound like he was going up to people and asking them if they wanted their photos taken, and it doesn't seem like he was approaching children saying he was Santa, either. I don't see anything wrong with it, I've known a couple of older men who look like Santa and during the holidays they would dress up. They make a lot of children smile just by being festive. I don't understand the problem with him being there, but, I don't pretend to know the rules of the Disney theme park, either, as far as what is considered appropriate attire. Doesn't sound like he's letting it bother him too much, so I won't let it bother me, either.